Cummins X15 SCR 2018-2021: OEM 5418501

Targeted NOx Control for Cummins X15 Aftertreatment Systems (2018–2021)

What is it?
The Cummins X15 SCR assembly, covering model years 2018 through 2021 and identified by OEM 5418501, is an emissions-control catalyst designed to neutralize nitrogen oxide compounds in the exhaust stream. Working in conjunction with Diesel Exhaust Fluid (DEF), the SCR initiates a chemical conversion process that reduces regulated emissions before exhaust gases exit the system.

Why choose this SCR Assembly?
This SCR unit is engineered specifically for the Cummins X15 platform, ensuring correct placement, sensor alignment, and compatibility with the engine’s emissions management strategy. When SCR efficiency declines, vehicles may experience warning indicators or inconsistent emissions readings. Installing the correct OEM-specified unit helps preserve proper system coordination and emissions consistency.

Key Benefits
✅ Engine-matched design for Cummins X15 platforms
✅ Enables proper chemical conversion of NOx emissions
✅ Supports consistent emissions readings and system communication
✅ Direct replacement with no fabrication required
✅ Built for extended service in high-heat exhaust environments

Applications
This SCR assembly is used in heavy-duty trucks and commercial vehicles equipped with Cummins X15 engines manufactured between 2018 and 2021. It’s commonly found in long-distance transport, regional hauling, and vocational operations where emissions management is a daily operating requirement.

Installation Notes
Before installation, allow the exhaust and aftertreatment system to cool fully. Remove the existing SCR unit and inspect DEF lines, sensors, and mounting points for contamination or wear. Install the replacement using proper seals and fasteners, then clear any stored fault codes and confirm correct system response using diagnostic equipment.

Final Thoughts
When emissions alerts appear or SCR efficiency begins to decline, replacing the SCR assembly with the correct OEM-specified component can help restore proper emissions processing. The Cummins X15 SCR (OEM 5418501) plays a critical role in keeping the aftertreatment system functioning as designed and supporting dependable vehicle operation.